Unlike way back with Windows XP where you can click and drag your taskbar from the bottom to the top or sides, you have to do it a little different in current versions of Windows. Here is how you do it.
Right click on an empty space on the taskbar and choose Properties or Taskbar Settings depending on your version of Windows.
On the Taskbar tab or Taskbar Location on Screen setting find where it says Taskbar location and select either bottom, left, right or top and then click OK.